Standing men only name worker (8)
I believe the answer is:
stagnant
'standing' is the definition.
(synonyms)
'men only name worker' is the wordplay.
'men only' becomes 'stag' (as in a stag do).
'name' becomes 'n' (common abbreviation e.g. on forms).
'worker' becomes 'ant' (worker is a type of ant).
'stag'+'n'+'ant'='STAGNANT'
(Other definitions for stagnant that I've seen before include "Stale - motionless" , "Showing little activity" , "making no progress" , "Unhealthy from lack of movement" , "unmoved" .)